Can someone tell me a wire under rear seat that gets 12v when car on?

I want to clean up the wiring in my car and I want to remove a trigger wire from the ignition circuit that controls my car pc turning on/off. I want to run a shorter wire from under the seat somewhere if there is a wire in there that will turn on and off with the ignition, any ideas?

1992 525i

it feeds the wipers relay with a violet wire. Also fuse position F49 is empty but it is also a Hot in run and start, so you can provide a fuse there and some terminal spade connector to hook in there.

Javier

I've re-checked 92 drawings and F44 is "Hot at all times" per "Power Distribution" drawing, "Hot in Run and Start" per fuse details drawings, and "Hot in accy. Run and Start" per "Wipers drawing", so your only blind bet would be F49 (there should be a Green wire feeding the fuse compartment, but no fuse nor outgoing wire).

Javier

Edit: Atention! You should insert a fuse to draw safe power from that green wire.

with my rear seat (E34 1992), and you may not find an F49 socket there. So guess your only chance is to draw "Hot in accy., run and start" power from your wipers relay pin 86. It comes from fuse F1, and is a Violet/Yellow wire under Wiper relay (K11) socket.

Hope this time, it will work.

Javier

Thanks so much Javier - will give it a go tomorrow. The wipers are fused and this connection is just a microswitch turn on lead, so it draws like .2 amps, so I think I am good to go.